Charging power cabinet and charging system
By introducing a charging power cabinet into the charging system and adopting a ring topology and a fourth switch, the problems of mutual interference between charging guns and insufficient power at the supercharging terminal are solved, efficient and flexible charging power allocation is achieved, and hardware costs and control complexity are reduced.
Patent Information
- Application Number
- CN202421824244.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-02-27
- Filing Date
- 2024-07-30
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-07-30
AI Technical Summary
When existing charging systems meet the needs of both fast charging and supercharging, there are problems such as charging guns interfering with each other and supercharging terminals being unable to allocate sufficient power, resulting in an inability to meet the charging needs of vehicles, high hardware costs and complex control logic.
A charging power cabinet is used, including a power supply module, a power distribution module and a charging control module. Through the combination of a ring topology and a fourth switch, the supercharging terminal can conveniently call the idle charging module, ensuring the high power output of the supercharging terminal and reducing the number of switches and the complexity of the control logic.
It achieves high power output of the supercharging terminal, reduces hardware costs and control logic complexity, ensures the stability and flexibility of the charging process, and meets the flexible deployment of different charging needs.
Smart Images
Figure CN223414605U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of charging systems, in particular to a charging power cabinet and a charging system. Background Art
[0002] With the development of the new energy vehicle industry, the battery capacity and charging rate of existing electric vehicles have gradually increased, and the required power consumption has also increased. To this end, existing public charging stations are equipped not only with fast charging, but also with higher-power supercharging. Previously, high-power charging systems generally only included relatively low-power fast charging terminals. When allocating power, multiple power supply units were centralized and allocated to a single charging gun, thereby expanding the charging power of a single charging gun to meet the power needs of the vehicle. In this charging system, full-matrix and full-ring topologies are often used to achieve power allocation. This requires a large number of DC switches, resulting in high hardware costs, numerous switching lines, and complex control logic. Moreover, when this topology is applied to charging stations that have both fast charging and supercharging, the fast charging and supercharging charging guns may interfere with each other during use. Even if the charging module is idle, it cannot be called by the supercharging terminal, making it impossible for the supercharging terminal to allocate sufficient charging power, resulting in an inability to meet the charging needs of the corresponding vehicle. Utility Model Content
[0003] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and provide a charging power cabinet and a charging system suitable for realizing the convenient calling of idle charging modules by supercharging terminals.
[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0005] Technical Solution 1: A charging power cabinet, which is suitable for connecting to multiple charging terminals, including at least one supercharging terminal and the rest being fast charging terminals; it includes: a power supply module, a power distribution module and a charging control module; the power supply module includes multiple power supply units, which are connected to the power distribution module; the power distribution module includes an output bus and a number of switches that are the same in number as the power supply units; each output bus is connected to each power supply unit, and the output bus is suitable for connecting to a charging terminal; each output bus is connected in series through a first switch to form a ring topology, and when the number of output buses is even, it is connected diagonally to the output bus through a second switch. another output bus related to the relationship; at the same time, the output bus is controlled to be connected to the corresponding charging terminal through a third switch; the charging control module controls the opening and closing of each switch according to the power request of the charging terminal to allocate the required power to the charging terminal; wherein, each of the fast charging terminals is connected to one of the output buses, and the output bus is a fast charging bus; each of the supercharging terminals is connected to two output buses, and the two output buses are supercharging buses; and there is at least one output bus among all the output buses, which is separated from any supercharging bus by at least one first switch and is not connected through the second switch, and the output bus is connected to any supercharging bus through a fourth switch.
[0006] Technical Solution 2 is based on Technical Solution 1: Among the two output buses adjacent to any of the supercharging buses, at least one output bus is not connected to any of the charging terminals, and this output bus is a disconnected bus.
[0007] Technical Solution 3, which is based on Technical Solution 2: In the output bus, any bus that is separated from any supercharging bus or disconnecting bus by at least one first switch and is not connected through the second switch is connected to any supercharging bus or disconnecting bus through one of the fourth switches.
[0008] Technical solution four is based on technical solution three: according to the bit sequence of all output buses, no other supercharging buses are included between the two supercharging buses connecting the same supercharging terminal, and the two supercharging buses have at least two output buses according to the positive counting of the bit sequence.
[0009] Technical solution five is based on technical solution four: in the power supply module, the number of power supply units is N, where N≥a+b*4, a is the number of fast charging terminals, and b is the number of super charging terminals.
[0010] Technical Solution 6 is based on Technical Solution 5: the number of power supply units is 12, and the number of charging terminals is 9, of which the number of supercharging terminals is 1 and the number of fast charging terminals is 8; in the bit sequence of all output buses, the bit sequence of the supercharging bus is 1st and 5th, the bit sequence of the disconnection bus is 2nd and 4th, and the fourth switch connects the output buses with the bit sequence of 1st and 9th.
[0011] In addition, the utility model also provides technical solution seven: a charging system, which includes: a plurality of charging terminals, including at least one supercharging terminal and the rest being fast charging terminals; and a supercharging and fast charging dual-purpose charging power cabinet as described in any one of technical solutions one to six, which is connected to each of the charging terminals.
[0012] Technical Solution 8 is based on Technical Solution 7: Each charging terminal includes at least one charging gun, and the charging guns include supercharging guns and fast charging guns according to different charging power. The rated charging power of the supercharging gun is greater than that of the fast charging gun; the supercharging terminal only includes one supercharging gun, and the fast charging terminal includes at least one fast charging gun.
[0013] Technical Solution 9, which is based on Technical Solution 8: Each of the charging guns is provided with an identification unit, which is used to identify the required power of the device to be charged and transmit it to the charging control module for matching with the power required by the corresponding charging terminal.
[0014] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following beneficial effects:
[0015] Technical solution one provides a charging power cabinet, which is used to power the charging terminal. The charging terminal may include a supercharging terminal and a fast charging terminal. The power of the supercharging terminal is greater than that of the fast charging terminal and can provide a faster charging speed.
[0016] The charging power cabinet includes a power supply module, a power distribution module and a charging control module; the power supply module includes multiple power supply units, which are connected to the power distribution module and then connected to the charging terminal through the power distribution module, thereby providing charging power to the charging terminal.
[0017] The power distribution module includes several output buses and switches. Each power supply unit is connected to an output bus, which is then connected to the charging terminal through the output bus. According to the type of charging terminal connected, the output bus is divided into a supercharge bus and a fast charge bus. For each supercharge terminal, there are two supercharge buses connected; for each fast charge terminal, there is one fast charge bus connected. In the absence of power allocation, each output bus will only charge the device to be charged with the output power of the power supply unit to which it is connected. At the same time, a first switch is set between each output bus to form a ring topology, and a second switch is set to connect the power supply units in the diagonal position. The star-ring topology formed allows each charging terminal to allocate the charging power of other idle power supply units when charging, thereby achieving higher power charging. Compared with the full-ring or full-rectangular topology, this topology reduces the number of switches, has low hardware cost, and has a small number of switching lines, which reduces the complexity of the control logic.
[0018] Among them, there is at least one output bus among all the output buses, which is separated from any supercharging bus by at least one first switch and is not connected through the second switch, and is connected to any supercharging bus through a fourth switch. In the case where the fourth switch is not set, even if the corresponding charging terminal of some output buses is not occupied (that is, the corresponding power supply unit is in an idle state), it is necessary to allocate power to the output buses that are not directly connected to them through the first switch or the second switch through other output buses. When the charging terminals corresponding to these other output buses are occupied, it is impossible to allocate power to the charging terminals corresponding to those output buses that are not directly connected. Among them, it is necessary to give priority to the power allocation of the supercharging terminal, so a fourth switch is set to connect a specific output bus to the supercharging bus, thereby improving the power allocation capability of the supercharging terminal to the power supply unit and ensuring high power output of the supercharging terminal.
[0019] The charging control module can open and close all switches according to pre-set power distribution rules, flexibly dispatch each power supply unit, and allocate power flexibly and variably, ensuring a stable and safe charging process.
[0020] In Technical Solution 2, among the output buses adjacent to any of the supercharging buses, at least one output bus is not connected to any of the charging terminals, and this output bus is a disconnected bus. When a disconnected bus is set up, the power of the corresponding power supply unit is not directly output to the charging terminal, but is instead provided to other charging terminals for use by allocating power. In this way, even when all charging terminals are occupied, the charging power of the power supply unit corresponding to the disconnected bus is unused. At the same time, the disconnected bus is set up adjacent to the supercharging bus and directly connected to it via a first switch. This ensures that the output power of the disconnected bus can be quickly and nearby provided to the supercharging terminal, ensuring high power output from the supercharging terminal.
[0021] In Technical Solution 3, all output buses that are separated from any Supercharge bus or Disconnect bus by at least one first switch and are not connected via a second switch are connected to any Supercharge bus or Disconnect bus via a fourth switch. By providing a fourth switch, a specific output bus can be connected to a Supercharge bus or Disconnect bus. Since the Disconnect bus has no directly connected charging terminal, it can be connected to the Disconnect bus via the fourth switch, allowing power to be smoothly allocated to the Supercharge bus.
[0022] In this way, full-matrix power switching of supercharging terminals can be achieved. This means that as long as the charging terminal corresponding to any power supply unit is not occupied, the first switch, second switch, and fourth switch can be used to directly transfer this idle power supply unit to the supercharging terminal. It is worth noting that Technical Solution 3 adopts the solution of setting up both a disconnect bus and a fourth switch. The two work together to achieve full-matrix power switching of supercharging terminals. This will not result in too few fast-charging terminals due to the setting of too many disconnect buses, thereby making the charging power cabinet lack of practical application value, nor will it increase the cost of devices by adding too many fourth switches.
[0023] In the fourth technical solution, according to the bit sequence of all output buses, no other supercharging buses are included between the two supercharging buses connected to the same supercharging terminal, and the two supercharging buses have at least two output buses according to the bit sequence. In this way, each supercharging bus can allocate the power of the two adjacent output buses according to the bit sequence, ensuring that the supercharging buses do not affect each other when allocating power; at the same time, when the supercharging terminal and some fast-charging terminals are in use, the remaining power supply units that are not supplying power can allocate charging power to the supercharging terminal or fast-charging terminal in use if conditions permit, avoiding interference between the supercharging terminal and the fast-charging terminal, which may result in the supercharging being unable to allocate sufficient charging power.
[0024] Furthermore, because Technical Solution 4 employs a configuration in which at least two output buses exist between the two Supercharging buses, the first switches connected to the two Supercharging buses can be connected to as many other output buses as possible without duplication, thereby achieving more efficient utilization of the first switches connected to the two Supercharging buses. Thus, compared to solutions in which two Supercharging buses are sequentially adjacent or have only one output bus between them, Technical Solution 4 can achieve full matrix power switching of the Supercharging terminal using as few fourth switches as possible.
[0025] In Technical Solution 7, the charging system adopts the supercharging and fast charging dual-purpose charging power cabinet of the above-mentioned technical solution. The charging power cabinet can be used to achieve balanced configuration of supercharging terminals and fast charging terminals and flexible allocation of output power, so that the power of the available output bus can be smoothly allocated to the supercharging bus to meet the charging needs of the equipment to be charged. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0027] Figure 1A schematic diagram of a charging system provided in Example 1 of the present utility model;
[0028] Figure 2 A schematic diagram of a charging system provided in Example 2 of the present utility model;
[0029] Figure 3 A schematic diagram of a charging system provided in Example 3 of the present utility model;
[0030] Figure 4 This is a schematic diagram of the charging system provided in Example 4 of the present utility model.
[0031] Description of main reference numerals:
[0032] Charging terminal 1;
[0033] Power supply module 2; power supply unit 21;
[0034] Power distribution module 3; output bus 30; first switch 31; second switch 32; third switch 33; fourth switch 34. DETAILED DESCRIPTION
[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.
[0036] In the claims, specification, and drawings of the present invention, unless otherwise expressly defined, the terms "first," "second," or "third" are used to distinguish between different objects, rather than to describe a specific order. In the claims, specification, and drawings of the present invention, the terms "including," "having," and their variations are used to mean "including but not limited to." Example 1:
[0037] Embodiment 1 of the present invention provides a charging system, which includes a plurality of charging terminals 1 and a charging power cabinet.
[0038] In this charging system, several charging terminals 1 include at least one supercharging terminal, and the rest are fast charging terminals. Each charging terminal 1 includes at least one charging gun. Charging guns include supercharging guns and fast charging guns according to different charging power. The rated charging power of the supercharging gun is greater than that of the fast charging gun. The supercharging terminal includes only one supercharging gun; the fast charging terminal includes at least one fast charging gun. Each charging gun is provided with an identification unit, which is used to identify the required power of the device to be charged and transmit it to the charging power cabinet for it to allocate the charging power required by the corresponding charging terminal 1.
[0039] Specifically, the difference between a supercharging terminal and a fast charging terminal is that the two can provide different rated charging powers for the devices to be charged. For example, the rated charging power that a fast charging terminal can provide is generally between 30kW and 100kW, while the rated charging power that a supercharging terminal can provide can be above 120kW. Through the supercharging terminal, faster charging speeds can be provided for devices to be charged that meet the requirements. Among them, in order to ensure the corresponding charging power, the supercharging terminal is only equipped with one supercharging gun; while in the fast charging terminal, due to the lower charging power, multiple fast charging guns can be set to charge more devices to be charged at the same time.
[0040] Reference Figure 1 In Example 1, there are 9 charging terminals 1, including a supercharging terminal S1 and 8 fast charging terminals P1 to P8.
[0041] In this charging system, the supercharge and fast charge dual-purpose charging power cabinet is suitable for connecting to multiple charging terminals 1, which includes a power supply module 2, a power distribution module 3 and a charging control module. Among them, the power supply module 2 includes multiple power supply units 21, and is connected to the power distribution module 3; the power distribution module 3 includes an output bus 30 and a plurality of switches that are the same in number as the power supply units 21; each output bus 30 is correspondingly connected to each power supply unit 21, and the output bus 30 is suitable for connecting to the charging terminal 1; each output bus 30 is connected in series through the first switch 31 to form a ring topology, and when the number of output buses 30 is even, it is connected to another output bus 30 that is diagonally opposite to it through the second switch 32; at the same time, the output bus 30 is controlled by the third switch 33 to connect to the corresponding charging terminal 1. Terminal 1; the charging control module controls the opening and closing of each switch according to the power request of the charging terminal 1 to allocate the required power to the charging terminal 1; wherein, each fast charging terminal is connected to an output bus 30, and the output bus 30 is a fast charging bus; each supercharging terminal is connected to two output buses 30, and the two output buses 30 are supercharging buses; and, according to the bit sequence of all output buses 30, no other supercharging buses are included between the two supercharging buses connected to the same supercharging terminal, and the two supercharging buses have at least two output buses 30 according to the positive counting of the bit sequence, and the two output buses 30 are not connected to the supercharging terminal.
[0042] In the power supply module 2, the number of power supply units 21 is N, where N≥a+b*4, a is the number of fast charging terminals, b is the number of super charging terminals, and preferably, N is greater than or equal to 10. Figure 1 In this embodiment, the power supply module 2 includes a total of 12 power supply units 21, namely M1 to M12. The rated power of each power supply unit 21 is 40kW, the total power of the power supply module 2 is 480kW, and each power supply unit 21 is connected to the power distribution module 3.
[0043] The power distribution module 3 includes 12 output buses 30, L1 to L12. Each output bus 30 is connected to a power supply unit 21 at one end and to a charging terminal 1 at the other end. For a fast charging terminal, one output bus 30 is connected; for a supercharging terminal, two output buses 30 are connected.
[0044] The power distribution module 3 also includes a plurality of switches, wherein a third switch 33 is provided on each output bus 30 to connect the corresponding power supply module 2 and the charging terminal 1. The third switch 33 can control the on / off of the charging path between the power supply module 2 and the corresponding charging terminal 1. In addition, a first switch 31 is provided between adjacent output buses 30, and the first switches 31 are used to connect the output buses 30 in series to form a ring topology circuit structure. At the same time, when the number of output buses 30 is even, another output bus 30 that is diagonally connected to the output bus 30 is connected through a second switch 32. The diagonal relationship here refers to the two output buses 30 with corresponding serial numbers in the ring topology circuit structure formed by the output buses 30. For example, Figure 1 In the example, the total number of power supply modules 2 is 12, then M1 corresponds to M7, M2 corresponds to M8, and so on, so that all output buses 30 are also connected through the second switch 32. In the absence of power allocation, each output bus 30 will only charge the device to be charged with the output power of the power supply unit 21 to which it is connected; at the same time, a first switch 31 is set between each output bus 30 to form a ring topology, and a second switch 32 is set to connect the power supply units 21 in the diagonal position. The star-ring topology structure formed allows each charging terminal 1 to allocate the charging power of other idle power supply units 21 when charging, achieving higher power charging; and compared with the full-ring or full-rectangular topology, this topology reduces the number of switches, has low hardware cost, and has a small number of switching lines, which reduces the complexity of the control logic.
[0045] The charging control module can control the opening and closing of each switch according to the power request identified by the identification unit on the charging terminal 1 to allocate the required power to the charging terminal 1.
[0046] It is worth noting that when describing the connection relationship between each output bus and each switch, each power supply unit and each charging terminal, the terms "connection" and "direct connection" used in this utility model, unless otherwise specified, all refer to "direct connection" and do not include a connection method that spans multiple output buses to achieve an indirect connection purpose.
[0047] In this embodiment, the output bus 30 connected to the fast charging terminal is a fast charging bus, for example Figure 1 The output bus 30 connected to the supercharge terminal is the supercharge bus, for example Figure 1L1 and L5 in. Figure 1 In this embodiment, only one supercharging terminal is included. The output buses 30 connected to the supercharging terminal only include one fast-charging bus, and no other supercharging buses are set. In addition, according to the bit sequence, that is, in the order of L1 to L12, when counting in a positive direction, three output buses 30, L2, L3, and L4, are also included between L1 and L5. In this way, each supercharging bus can allocate the power of the two adjacent output buses 30 according to the bit sequence, ensuring that the supercharging buses do not affect each other when allocating power. At the same time, when the supercharging terminal and some fast-charging terminals are in use, the remaining power supply units 21 that are not supplying power can allocate charging power to the supercharging terminal or fast-charging terminal in use, if conditions permit, to avoid interference between the supercharging terminal and the fast-charging terminal, which may result in the supercharging being unable to allocate sufficient charging power.
[0048] Furthermore, among the two output buses 30 adjacent to any supercharging bus, at least one output bus 30 is not connected to any charging terminal 1, and the output bus 30 is a disconnected bus. Figure 1 , the two supercharging buses L1 and L5 are connected to the supercharging terminal S1. The output bus 30 closest to L1 is L2, and the output buses 30 closest to L5 are L4 and L6. L4 is selected as the output bus 30, and neither L2 nor L4 is connected to any charging terminal 1. At the same time, L3 is connected to the fast charging terminal P1. Obviously, only the output bus 30 connected to the charging terminal 1 can directly charge the device to be charged through the power supply module 2. Since the disconnect bus is not connected to the charging terminal 1, it cannot directly charge the device to be charged and can only be allocated to other output buses 30 through the first switch 31 and then output to the charging terminal 1 corresponding to these output buses 30. A disconnect bus is set up, and the power of the corresponding power supply unit 21 is not directly output to the charging terminal 1, but is provided to other charging terminals 1 for use by allocating power. In this way, even when all charging terminals 1 are occupied, the charging power of the power supply unit 21 corresponding to the disconnect bus is unused; at the same time, the disconnect bus is set adjacent to the supercharging bus to ensure that the output power of the disconnect bus can be provided to the supercharging terminal nearby, ensuring high power output of the supercharging terminal. Of course, in other embodiments, if the number of power supply units is larger and the power demand of the supercharging terminal is higher, more disconnect buses can be set up, and conversely, fewer disconnect buses can be set up. In addition, it is also feasible to configure the disconnect bus to be directly connected to the supercharging bus through the second switch 32 instead of through the first switch 31. For example, when L1 and L5 are configured as supercharging buses, L7 and L11 can also be configured as disconnect buses.
[0049] In addition, the switches included in the power distribution module 3 also include a fourth switch 34. In the power distribution module 3, there is at least one fourth switch 34; in all output buses 30, those that are separated from any supercharge bus or disconnect bus by at least one first switch 31 and are not connected through the second switch 32 are all connected to any supercharge bus or disconnect bus through the fourth switch 34. Figure 1 The schematic diagram of the charging power cabinet includes a fourth switch 34, which connects two output buses 30, L1 and L9. L1 is the supercharging bus connected to the supercharging terminal. L9 is separated from L5 by three first switches 31 and is not connected to L1, L2, L4, or L5 via the second switch 32. Of course, L9 can also be connected to L2, L4, or L5 via the fourth switch 34, as long as the above requirements are met. Without the fourth switch 34, even if the corresponding charging terminal 1 of some output buses 30 is not occupied, power cannot be allocated to other charging terminals 1 in need due to the need for power allocation through other output buses 30. In order to prioritize power allocation to supercharging terminals, the fourth switch 34 is provided to connect specific output buses 30 to the supercharging bus or the disconnect bus. Since the disconnect bus is not directly connected to a charging terminal 1, power can be allocated to the supercharging bus through the disconnect bus.
[0050] After receiving the power request, the charging control module can control the opening and closing of the above-mentioned first switch 31, second switch 32, third switch 33 and fourth switch 34, and allocate the charging power of each power supply unit 21 to the corresponding charging terminal 1. Among them, the charging control module may include a processor and a memory, and the memory stores a corresponding switch switching rule program, and the processor can control the switching of each switch according to the program. The charging control module and each charging terminal 1 can communicate through the CAN bus. The identification unit set on the charging gun on the charging terminal 1 can also be a processor, which can identify and process the power consumption of the device to be charged connected to the charging gun, and send the information to the charging control module. The charging control module then controls the opening and closing of the corresponding switches to allocate the output power of different charging modules according to the current usage of the entire charging power cabinet.
[0051] Reference Figure 1When the two fast charging terminals P4 and P6 are charging the devices to be charged, the two power supply units 21 M8 and M10 directly supply power to P4 and P6 by closing the corresponding third switches 33. At the same time, according to the power requirements of the devices to be charged connected to P4 and P6, for example, the power demand corresponding to P4 is 80kW, and the power demand corresponding to P6 is 40kW. At this time, P6 can be directly powered by M10 without any allocation, while P4 needs to allocate additional power supply units 21 to meet the power demand. For example, if P3 is idle at this time, the first switch 31 between L7 and L8 can be directly closed, and the third switch 33 on L7 can be turned off at the same time, so that the power of M7 is allocated to L8.
[0052] If the supercharging terminal S1 is currently being used by a newly charged device, the two power supply units 21, M1 and M5, will close their corresponding third switches 33 to provide power to S1. Alternatively, a combination of M1 and M2, or M4 and M5, can be used. Furthermore, if S1's power demand is 160kW, the first switches 31 between L1 and L2, and between L4 and L5, will be closed to provide sufficient output power to S1.
[0053] Furthermore, if all the fast charging terminals P2 to P4 and P6 to P8 are occupied at this time, or the power of the corresponding power supply unit 21 is allocated to other fast charging terminals, and the power demand of S1 increases to 200kW, the power of M9 can be directly allocated to L1 by closing the fourth switch 34 between L1 and L9 to meet the power demand of S1.
[0054] It is worth noting that when a certain output bus 30 wishes to call a certain idle power supply unit 21, if it can be directly connected to the output bus corresponding to the power supply unit 21 through the first switch 31, the second switch 32 or the fourth switch 34, then the power switching speed is faster; this is because, at this time, as long as the output voltages of the power supply units corresponding to the two directly connected output buses are roughly equal, and then the voltages of the two output buses are roughly equal, so that the voltages on both sides of the corresponding switches are roughly equal, the corresponding switches can be closed.
[0055] However, if the power supply units corresponding to the output buses 30 that are not directly connected to each other are called, the power switching speed will be slow. This is because in addition to these two output buses that are not directly connected, it is also necessary to ensure that the voltage of at least one other output bus located between the two is roughly equal to them in order to close the corresponding switches therebetween. Therefore, it is inevitable to modulate the output voltages of more power supply units; and the power supply unit 21 is a switching power supply, and the modulation process of its output voltage requires a certain amount of time, which results in the defects of slow power switching speed and complex switching logic in this case.
[0056] For this reason, the aforementioned switch switching rule program typically prioritizes using the first switch 31, second switch 32, or fourth switch 34 connected to the output bus 30 to access the power supply unit corresponding to the directly connected output bus, achieving faster power switching. If this still fails to meet the power demand, then consideration is given to finding power supply units corresponding to other non-directly connected output buses for access.
[0057] Example 2:
[0058] Embodiment 2 of the present invention provides a charging system. The difference between this charging system and embodiment 1 lies in the circuit layout of the supercharging and fast charging dual-purpose charging power cabinet.
[0059] Reference Figure 2 S1, acting as a supercharging terminal, is connected to output buses 30 of L1 and L4, while L2 and L3 are disconnect buses, neither of which is connected to charging terminal 1. Furthermore, in this circuit layout, there are two output buses 30, L6 and L11, separated from either supercharging bus or disconnect bus by a first switch 31, and not connected via a second switch 32. Therefore, L6 is connected to L1 via a fourth switch 34, and L11 is connected to L4 via a fourth switch 34. When this charging power cabinet is in use, if S1 is in use and has a high power demand, and the power of M5, M7 to M10, and M12 is being allocated, the power of M6 and M11 can be allocated to S1 by closing the fourth switch 34 between L1 and L6, and between L4 and L11.
[0060] Of course, it can also be seen that compared to Example 1, Example 2 requires the addition of a fourth switch 34, which increases the cost. However, in Example 1, since the two disconnect buses L2 and L4 are not adjacent to each other, but there is an output bus L3, efficient utilization of the first switch 31 connected to the disconnect bus is achieved, thereby reducing the use of the fourth switch 34. In addition, as long as the disconnect bus L2 or L4 is not used by the supercharging terminal S1, the corresponding power supply units M2 and M4 can be connected to the fast charging bus L3 through the corresponding first switch 31 to be quickly called by the fast charging terminal P1, or can be quickly called by the fast charging terminals P4 and P6 respectively through the corresponding second switch 32.
[0061] In Example 2, since the two disconnect buses L2 and L3 are adjacent to each other, the first switch 31 therebetween can only be used for power switching of the supercharging terminal, and cannot be used for power switching of the fast charging terminal. The first switch 31 is not efficiently reused, so that the two power supply units 21, M2 and M3, can only be quickly called by the fast charging terminal P4 or P5 respectively through the corresponding second switch 32. Once the supercharging terminal S1 is not used, the defects of Example 2 become apparent: when there are fewer fast charging vehicles to be charged, the speed of power switching is reduced and the complexity of switching is increased; and when there are more fast charging vehicles to be charged, the power supply units M2 and M3 cannot even be called, which directly reduces the ability of the power supply units M2 and M3 to be called by the fast charging terminal, and the flexibility is poor.
[0062] Example 3:
[0063] Embodiment 2 of the present invention provides a charging system. The difference between this charging system and embodiment 1 lies in the circuit layout of the supercharging and fast charging dual-purpose charging power cabinet.
[0064] Reference Figure 2 S1, acting as a supercharging terminal, is connected to output buses 30 of L1 and L4. L2 and L5 are disconnect buses and are not connected to charging terminal 1. Furthermore, in this circuit layout, there is a single output bus 30, L9, which is separated from any supercharging bus or disconnect bus by a first switch 31 and is not connected via a second switch 32. Therefore, L9 is connected to L1 via a fourth switch 34. When this charging power cabinet is in use, if S1 is in use and has a high power demand, and the power of M3, M6 to M8, and M10 to M12 is being allocated, the power of M9 can be allocated to S1 by closing the fourth switch 34 between L1 and L9.
[0065] It can be seen that although Example 3 is the same as Example 2 in that both use L1 and L4 as the supercharging bus, because its disconnection buses L2 and L5 are not adjacent, it does not have the disadvantages of Example 2. In addition, compared with the solutions using L1 and L2 or L1 and L3 as the supercharging bus, even if these two comparison solutions both set up the disconnection bus and the fourth switch according to the aforementioned embodiments, Examples 1-3 have the advantage of using fewer fourth switches under the same circumstances.
[0066] Example 4:
[0067] Embodiment 2 of the present invention provides a charging system. The difference between this charging system and embodiment 1 lies in the circuit layout of the supercharging and fast charging dual-purpose charging power cabinet.
[0068] In the charging power cabinet provided by the present invention, two supercharging buses connected to the same supercharging terminal are grouped together. When the power distribution module 3 includes multiple groups of supercharging buses, each supercharging bus is connected to at least one fourth switch 34 .
[0069] Specifically, refer to Figure 4 In Example 4, there are 16 power supply units 21, namely M1 to M16. The output power of each power supply unit 21 is 40kW, so the total output power is 640kW. There are two supercharging terminals, namely S1 and S2. S1 connects L1 and L4, and S2 connects L9 and L12. L2 and L3 are disconnected buses close to S1, and L10 and L11 are disconnected buses close to S2. At this time, in this circuit layout, there are four output buses 30, namely L6, L7, L14 and L15. There is a first switch 31 between each supercharging bus or disconnected bus, and they are not connected through the second switch 32. Therefore, L6 is connected to L1 through the fourth switch 34, L7 is connected to L4 through the fourth switch 34, L14 is connected to L9 through the fourth switch 34, and L15 is connected to L12 through the fourth switch 34. When S1 and S2 are in use, M6, M7, M14 and M15 can be deployed to the corresponding supercharging terminal through the fourth switch 34.
[0070] The above description and embodiments are used to explain the scope of protection of the utility model, but do not constitute a limitation on the scope of protection of the utility model. Based on the enlightenment of the utility model or the above embodiments, modifications, equivalent replacements, or other improvements to the embodiments of the utility model or part of the technical features thereof that can be obtained by ordinary technicians in this field through logical analysis, reasoning, or limited experiments in combination with common knowledge, ordinary technical knowledge in this field and / or existing technology should be included in the scope of protection of the utility model.
Claims
1. A charging power cabinet, which is suitable for connecting to a plurality of charging terminals (1), wherein the plurality of charging terminals (1) include at least one supercharging terminal and the rest are fast charging terminals; Its characteristics are: include: A power supply module (2), a power distribution module (3) and a charging control module; The power supply module (2) includes a plurality of power supply units (21) and is connected to the power distribution module (3); The power distribution module (3) comprises output buses (30) and a plurality of switches, the number of which is the same as the number of the power supply units (21); each output bus (30) is connected to each power supply unit (21), and the output bus (30) is suitable for connecting to a charging terminal (1); the output buses (30) are connected in series through a first switch (31) to form a ring topology, and when the number of output buses (30) is an even number, another output bus (30) in a diagonal relationship with the output bus (30) is connected through a second switch (32); at the same time, the output bus (30) is controlled to connect to the corresponding charging terminal (1) through a third switch (33); The charging control module controls the opening and closing of each switch according to the power request of the charging terminal (1) to allocate the required power to the charging terminal (1); in, Each of the fast charging terminals is connected to an output bus (30), which is a fast charging bus; each of the supercharging terminals is connected to two output buses (30), which are both supercharging buses; and at least one of all the output buses (30) exists, which is separated from any supercharging bus by at least one first switch (31) and is not connected via a second switch (32), and is connected to any supercharging bus via a fourth switch (34).
2. The charging power cabinet according to claim 1, characterized in that: Among the two output buses (30) adjacent to any of the supercharging buses, at least one output bus (30) is not connected to any of the charging terminals (1), and the output bus (30) is a disconnected bus.
3. The charging power cabinet according to claim 2, wherein: In the output bus (30), each of the output buses (30) that is separated from any supercharge bus or disconnection bus by at least one first switch (31) and is not connected via the second switch (32) is connected to any supercharge bus or disconnection bus via one of the fourth switches (34).
4. The charging power cabinet according to claim 3, wherein: According to the bit sequence of all output buses (30), no other supercharging buses are included between the two supercharging buses connected to the same supercharging terminal, and the two supercharging buses have at least two output buses (30) according to the bit sequence counted in a positive direction.
5. The charging power cabinet according to claim 4, characterized in that: In the power supply module (2), the number of power supply units (21) is N, where N≥a+b*4, a is the number of fast charging terminals, and b is the number of super charging terminals.
6. The charging power cabinet according to claim 5, characterized in that: The number of the power supply units (21) is 12, the number of the charging terminals (1) is 9, of which the number of the supercharging terminal is 1 and the number of the fast charging terminals is 8; in the bit sequence of all output buses (30), the bit sequence of the supercharging bus is 1st and 5th, the bit sequence of the disconnection bus is 2nd and 4th, and the fourth switch (34) is connected to the output buses (30) with the bit sequence of 1st and 9th.
7. A charging system, characterized in that it comprises: A plurality of charging terminals (1), including at least one supercharging terminal and the rest being fast charging terminals; and The charging power cabinet according to any one of claims 1 to 6, which is connected to each of the charging terminals (1).
8. The charging system according to claim 7, wherein: Each charging terminal (1) includes at least one charging gun, and the charging guns include supercharging guns and fast charging guns according to different charging powers, and the rated charging power of the supercharging gun is greater than that of the fast charging gun; the supercharging terminal includes only one supercharging gun, and the fast charging terminal includes at least one fast charging gun.
9. The charging system according to claim 8, wherein: Each charging gun is provided with an identification unit, which is used to identify the power required by the device to be charged and transmit it to the charging control module for matching with the power required by the corresponding charging terminal (1).